Marketplace · API · x402

api.agentmercantile.com/v1/transaction-gas-preflight

Return bounded factual eth_estimateGas units and recent eth_feeHistory execution-fee evidence for one unsigned Ethereum or Base transaction. Not execution, signing, custody, trading, or a guaranteed final cost. Call when you need point-in-time gas units and recent execution-fee context before signing or submitting.

Endpointhttps://api.agentmercantile.com/v1/transaction-gas-preflight
Trust100% uptime over 1 checks · ~1841 ms
PricingPay per call with x402, no account. Call it to get an exact quote before paying.
networkeip155:8453
schemeexact
pay to0xdb7b2b54f80479826222749a2ea73a8acc306e1e
methodPOST
last updated2026-11-11T15:39:45.077Z

Use it

Call it (an x402 client pays automatically)

curl -i https://api.agentmercantile.com/v1/transaction-gas-preflight
# 402 reply -> sign PAYMENT-REQUIRED with an x402 client (e.g. @x402/fetch) -> retry with PAYMENT-SIGNATURE

This listing as JSON

curl https://aipaygen.com/v1/catalog/api/x402-b5c51239bf04cc86

Search the whole marketplace from your agent (MCP)

{
  "mcpServers": {
    "aipaygen": {
      "url": "https://aipaygen.com/mcp"
    }
  }
}

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